NixBSD is an attempt to make a reproducible and declarable BSD, based on NixOS. Although theoretically much of this work could be copied to build other BSDs, all work thus far has been focused on building a FreeBSD distribution.
HoloISO Alternatives
HoloISO is described as 'SteamOS 3 (Holo) archiso configuration' and is a Linux Distro in the os & utilities category. There are more than 50 alternatives to HoloISO for a variety of platforms, including Linux, Self-Hosted, Windows, BSD and Arch Linux apps. The best HoloISO alternative is Linux Mint, which is both free and Open Source. Other great apps like HoloISO are Ubuntu, Debian, Fedora and Arch Linux.
Alternatives list
Regata OS is an Operating System based on Linux (more precisely on openSUSE) developed for all types of users, however, with a special focus on gamers and content creators.


GuestSneezeOS is a robust, free-to-use, lightweight, immutable, operating system designed to bring the functionality of Valve's SteamOS to a wide range of devices, including desktops, laptops, and more.
Cost / License
- Free
- Open Source
Platforms
- Linux
- SteamOS



A libre open source Linux operating system. Focused on ease of use, simplicy, and flexibility to adapt and change.

ParticleOS is a fully customizable immutable distribution implementing the concepts described in Fitting Everything Together.
Salient OS is a rolling-release distribution aimed at Creative Multi-Media and Gaming Enthusiasts.
RebeccaBlackOS is a Debian-based live distribution which can be used to run Wayland desktop sessions. RebeccaBlackOS can run a number of popular open source desktop environments on top of a Wayland graphical session.


+4
ExectOS aims to be a stable and flexible, general purpose operating system written from scratch. It is designed to be modular, maintainable and compatible with existing software. It implements a brand new XT architecture and features own native application interface.


+3
The siduction distribution is a desktop-oriented operating system and live medium based on the 'unstable' branch of Debian GNU/Linux.

ObsidianOS is an Arch-based Linux distro with an A/B partition style so if a package has a breaking change that causes some issues, you can just reboot into the other partition and restore the other one, while relying on the robustness of EXT4.
















